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/*
* Copyright 2013 eXo Platform SAS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package juzu.impl.common;
import java.util.regex.Pattern;
/**
* Gather various lexers here.
*
* @author Julien Viet
*/
class Lexers {
/** The name validator. */
static final Pattern NAME_VALIDATOR = Pattern.compile("(?!\\.)" + "[^/]+" + "(? 0) {
return parsePath(mode, base, padding, path, off + 3, size - 1);
} else if (padding > 0) {
return parsePath(mode, base, padding - 1, path, off + 3, size);
} else {
throw new IllegalArgumentException("Invalid path");
}
default:
throw new AssertionError("Should not be here");
}
}
for (int i = off;i < pos;i++) {
if (path.charAt(i) == '.') {
throw new IllegalArgumentException("No '.' allowed here");
}
}
String[] ret = parsePath(mode, base, padding, path, pos + 1, size + 1);
if (ret[at] == null) {
ret[at] = path.substring(off, pos);
}
return ret;
}
}
}
else {
String[] ret = new String[padding + size + 2];
System.arraycopy(base, 0, ret, 0, padding);
ret[at] = "";
return ret;
}
}
/**
* Parse a dot separated name.
*
* @param s the sequence
* @param from the from index
* @param end the end index
* @return the parsed identifiers
* @throws IllegalArgumentException
*/
static String[] parseName(CharSequence s, int from, int end) throws IllegalArgumentException {
if (from < 0) {
throw new IllegalArgumentException("From bound " + from + " cannot be negative");
}
if (from > end) {
throw new IllegalArgumentException("From bound " + from + " cannot be greater than the end bound " + end);
}
if (from == end) {
return Name.EMPTY_STRING_ARRAY;
} else {
return parseName(0, s, from, end);
}
}
private static String[] parseName(int size, CharSequence s, int from, int end) {
int next = Tools.indexOf(s, '.', from, end);
String[] identifiers;
if (next < 0) {
if (from == end) {
throw new IllegalArgumentException("Empty segment");
}
identifiers = new String[size + 1];
identifiers[size] = s.subSequence(from, end).toString();
} else {
if (next == from) {
throw new IllegalArgumentException("Empty segment");
}
identifiers = parseName(size + 1, s, next + 1, end);
identifiers[size] = s.subSequence(from, next).toString();
}
return identifiers;
}
}
